If you have a WordPress site and have installed Google Site Kit, you may see that it gets stuck and stays endlessly on CHECKING COMPATIBILITY. If that happens there are several possible fixes but in most cases the issue seems to be that Google is unable to verify the site because of SSL issues.
The solution is to make sure that your WordPress SETTINGS > GENERAL > WordPress Address (URL) and Site Address (URL) are both set to use HTTPS:// prefix. That, of course, assumes your site has SSL. If it does not do NOT make that change.
We have several other fixes that have worked for others below this screen shot.
If that does not work for you, Google suggests:
- Deactivating then reactivating Sitekit
- Uninstalling then reinstalling Google Site Kit
- Open an Incognito session in MS Edge or Chrome and try items 1 and 2 above